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Finding the Fourth Proportional to 28,291.80, 39,043.42 and 16,963.14

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Solution

The fourth proportional to 28,291.80, 39,043.42 and 16,963.14 is: 23,409.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.80 : 39,043.42 = 16,963.14 : x
  2. Step 2: Convert to fraction form
    28,291.80/39,043.42 = 16,963.14/x
  3. Step 3: Cross multiply
    28,291.80x = 39,043.42 × 16,963.14
  4. Step 4: Simplify right side
    28,291.80x = 662,298,999.54
  5. Step 5: Solve for x
    x = 662,298,999.54/28,291.80
  6. Step 6: Final answer
    x = 23,409.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.